Expanded conical nozzle for two combustion liquids



Dec. 5, 1950 R. H. GODDARD EXPANDED CONICAL NOZZLE FOR TWO COMBUSTION LIQUIDS Filed March 4, 1948 R O T N E V m #8? @52 Mid,

ATTORN EY Patented Dec. 5, 1950 EXPANDED CONICAL NOZZLE FOR TWO COMBUSTION LIQUIDS Robert H. Goddard, deceased, late of Annapolis,

Md., by Esther C. Goddard, executrix, Worcester, Mass., assignor of one-half to The Daniel and Florence Guggenheim Foundation, New York, N. Y., a corporation of New York Application March 4, 1948, Serial No. 13,057

Claims. 1

This invention relates to combustion chambers as used in propulsion apparatus.

It is the general object of the invention to provide an improved feeding construction by which two combustion liquids may be co-axially fed to a combustion chamber and may be efiectively intermingled.

More specifically, provision is made for feeding one combustion liquid in an expanding conical sheet,'and for feeding a second combustion liquid in a contracting and intersecting conical sheet. Preferably the latter sheet is of greater volume than the former and diverts the former sheet inward.

The invention further relates to arrangements and combinations of parts which will be hereinafter described and more particularly pointed out in the appended claims.

Preferred forms of the invention are shown in the drawing, in which Fig. 1 is a sectional front elevation of one form of the improved feeding construction;

Fig. 2 is a transverse sectional view, taken along the line 2-2 in Fig. 1;

Fig. 3 is a detail sectional view showing a slight modification;

Fig. 4 is a view similar to Fig. 3 but showing an additional modification;

Fig. 5 is a transverse sectional view, taken along the line 55 in Fig. 4:; and

Fig. 6 is a detail perspective view, looking in the direction of the arrow 6 in Fig. 4.

Referring to Figs. 1 to 3, the rear end portion of a combustion chamber C is shown as provided with a sleeve I!) having an outwardly expanding or conical portion II and an inwardly directed and contracted end flange l2.

A feed pipe I5 is connected into a fitting which is threaded into the sleeve l0 and which has an inner sleeve portion 22 which supports a tubular member 25. The member 25 has an expanding or conical portion 26 which is separated from the flange I2 by an annular slot or opening 28.

A spreader 30 is threaded in a spider 3| within the member 25, and is spaced from the conical portion 26 of said member to provide an annular feed slot or opening 33 which may be adjusted by turning the spreader in its threaded support. The member 25 is preferably separated from the sleeve 22 by an air space S to prevent freezing of the gasoline by liquid oxygen.

Gasoline is fed to the chamber C through the tubular member 25 and annular conical slot 33, and the gasoline is so directed by the spreader 30 i that it forms an expanding conical sheet along the inner surface of the portion 26 of the member 25. a

A second combustion liquid, as liquid oxygen, is fed through the pipe IE to the space S2 between the conical members 26 and I l, and is directed inward through the slot or opening 28 between the end of the member 26 and the flange l2.

As a substantially larger mass of oxygen is required for satisfactory combustion, the greater mass of the oxygen diverts the gasoline toward a focus F, as indicated by the arrows-in Fig. 1. Very little of the gasoline will pass unmixed through the oxygen sheet.

If the flange I2 is extended slightly further inward, as indicated at Hot in Fig. 3, inward deflection of the gasoline sheet will be made definitely certain.

In Figs. 4 to 6, a construction is shown by which the sheets of gasoline and oxygen are substantially broken up as they approach their locus of intersection. In this construction, the inner conical member 2611 is joined to the outer flange l2b by a series of spaced triangular connections 40, and the member 26a is provided with a series of triangular lugs 42 mounted in spaced relation on the inner surface of said member.

With this construction, each sheet of combustion liquid is broken up into separate sections as it approaches the point of intersection. Exceptionally good intermingling of the combustion liquids is thereby attained.

Having thus described the invention and the advantages thereof, it will be understood that the invention is not to be limited to the details herein disclosed, otherwise than as set forth in the claims, but what is claimed is:

1. In combustion apparatus which includes a combustion chamber, a, feeding construction comprising an inner tubular feeding member having a substantially expanded conical inner end portion, means to supply a combustion liquid to said tubular member, a spreader in said tubular member and adjacent the entrance end of said expandin end portion and producing an expanding liquid film covering the inner conical surface of said inner end portion, an outer tubular feeding member having a substantially expanded conical inner end portion with the edge part thereof inwardly displaced and positioned adjacent the inner end of said inner tubular member, said adjacent parts defining an annular feeding slot and said inner and outer tubular members and the conical inner end portions thereof being spaced apart to provide a. jacket 3 space, and means to supply a second combustion liquid to said Jacket space and to said chamber through said annular slot.

2. The combination in combustion apparatus as set forth in claim 1. in which the displaced edge part of the outer member extends definitely within the inner end of the inner member and intercepts the expanding liquid film within said inner member.

3. The combination in combustion apparatus as set forth in claim 1, in which spaced connec-- tions join the inner end of the inner member to the edge portion of the outer member and hold said members in predetermined spaced relation.

4. The combination in combustion apparatus as set forth in claim 1, in which spaced lugs on the inner surface of the conical part of the inner member break up the expanding liquid film on said inner surface as it approaches its locus of intersection with the second liquid.

5. The combination in combustion apparatus as set forth in claim 1, in which a tubular partition provides an annular air space between the jacket space for the outer member and the passage through the inner tubular member.

ESTHER O. GODDARD, Executrir of the Last Will and Testament of Robert H. Goddard, Deceased.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,008,866 Shaw Nov. 14, 1911 2,351,697 Nielson June 20, 1944 2,391,422 Jackson Dec. 25, 1945 

